A bacteria-based infection of the spinal cord. Capable of being spread at any time via breathing, leaving germs,and epicly failing at a video game. Super Cancer causes the spinal cord to swell, causing the bones made to protect the spine pinch nerves between virtebre. This can cause many nerve-based problems with long names that I cant spell accuratly. Super Cancer, dispite the name, has nothing to do with normal cancer of any kind.

A for of heart, lung, stomach, brain, kidney, ect. cancer that can only be contracted from exposure to chrono radiation. Chrono radiation itself can only be found on board and in every nook and cranny of time machines. The truth is time travel is real and possible but will cause super cancer at some point in the travelers life be it immediately after or 12 months before. Due to it's extremely unpredictable nature time travel has been all but outlawed to prevent spread of Super cancer

Doc: Hey martey I went to a rejuvenation clinic. They got me all fixed up change of blood, new kidney, they even cured my super cancer

Marty: Super cancer?

Doc: Yeah, side effect of time travel. Of course you ALWAYS wore your lead-lined suit in the time machine right?